The people who truly need preboarding will be better off if they don't have to fight their way all the way to the back of the plane and back. Getting a wheelchair all the way back, or having the frail attempt to walk 30 rows rather than 1 or 2 is a significant problem.
I would agree that the early boarders should exit last, though.
I don't think any of us have any complaints about those who truly need it. It those who are taking unfair advantage of the privilege that annoy many.
Hope you're feeling better, Kevin.